Disable matchBrackets in monaco (#36089)

This one may be a bit opinionated but I prefer my editors to be clean of
distractions and these bracket highlights look too much like a cursor on
quick glance imho.

Before:
<img width="345" height="67" alt="Screenshot 2025-12-04 at 20 26 14"
src="https://github.com/user-attachments/assets/10b2ea19-4468-401b-9425-1caa1b64afe4"
/>

After:
<img width="319" height="69" alt="Screenshot 2025-12-04 at 20 26 25"
src="https://github.com/user-attachments/assets/edbd3291-965d-421f-85cf-8d927b2a323a"
/>

web_src/js/features/codeeditor.ts

@@ -41,6 +41,7 @@ const baseOptions: MonacoOpts = {
   wrappingIndent: 'none',
   wordWrapBreakAfterCharacters: '',
   wordWrapBreakBeforeCharacters: '',
+  matchBrackets: 'never',
 };
 
 function getEditorconfig(input: HTMLInputElement): EditorConfig | null {